Draft-rigging



A. N. WARFIELD.

DRAFT RIGGING.

APPL|cAT1ou-f|LED Dic. 2o. ma.

lm9111011 sept. 14, 1920.A

1 Q QN SM UNITED STATES PATENT @meer AARON N. WARFIELD, or LONDON,ONTARIO, CANADA.

. DRAFT-RIGGING.

To all whom it may concern:

Be it known that I, AARON N. WARFLELD, a citizen of the United States ofAmerica, residing at London, in the county of Middlesex, Province ofOntario, and Dominionv of Canada, have invented certain new and usefulImprovements in Draft-Riggingof which the following is a specification,reference being had therein to the accompanying drawings.

Y This inventionv relates to a draft rigging, and my invention aims toprovide a draft rigging, either for freight or passenger cars, whichwill increase the traotive power of the locomotive and permit thelocomotive to pick up a load, with a quick get-away, without unduestresses or vstrains on any part of the rolling stock, without thelocomotive pounding or grinding rails, particularly at the joints,andwithout straining any connection between the various units of atrain. i f

Mv invention further aims to provide a draft rigging wherein a series ofsprings are arranged, so that some ofsaid springs may coperate as aresistance against a draft and all of said springs coperate as aresistance against impact or a buffing action. The springs are compactlyarranged to` resist a reciprocable movementofav draw bar, and relievecar couplers and rolling stock of ordinary jars and shocks incident tothe coupling of cars or maintaining a yieldable conk nection betweencars when in motion, thus increasing the longevity of rolling stockparticularly when subjected to excessive stresses and strains.

My invention will be hereinafter described and thenclaimed, andreference will now be had to the drawings, wherein- Figure 1 is ahorizontal sectional View of the draft rigging, showing the greater partthereof in plan;

Fig. 2 is a longitudinal sectional view of the draft rigging;

Fig. 3 is a side elevation of a buffer tie rod;

Fig. 4 is a similar view of one of the main tie rods of the draftrigging;

Fig. 5 is a cross sectional view of the draft rigging showing thehousing thereof as including channel bars;

Fig. 6 is a similar view showing the housing as including I beams;

Specification of Letters Patent. Patented Sept. 14 1'920.

Application filed December 2o, 191s. VYserial'.1\-ro.v`2e7',51=:1. f

F ig. 7 is a similar view showing the housing including a channelmember, and

Fig. 8 is a diagrammatic view illustrating i a modification ofmy'invention.

The draft rigging housing 4comprises top and bottom plates 1 disposed inparallelism, and connected, as shown in Figs. 1 and 5, by channelbarsj2, which may be securedto the top and bottom plate by brazing, spotwelding or otherwise, so th'atthe top and bottom plates will bemaintainedV in `spaced 'relation and together with the channel bars 2afford an oblong inclosure for the draft'rigging mechanism. It is alsopossible vto substitute beams' 3 for the `channel bars 2, as shown in Fig. 6, or make the housing of a channelmember 4 suitably connected to atop plate '.5 asshown in'Fig. 7 Considering'thehousing in nF ig's. 1 and57 the outer end thereof isY providedv with `'sets of stops 6 and' 7-connected to thel Vchannel bars 2 by bolts and nuts 8 or otherYfast,ening means, the "set-of stops 6 being vof`greater length than theset of stops 7.

Mounted in the inner end of the housing is ayoke 9, serving as a'stop,and vintermediate the yoke 9 and the stops-6 are sets of stops 10Y and11.* These ystopsfab'ut and hold a transversepartition Y12i inVK thehousing and said partition hasopenings 13.

Slidable between the stops 6 is a cross head 14 connected to a draw bar15 and adapted to impinge against the set of stops 7. Connected to thecross head 14 are tie rods 16 having enlarged cylindrical pick-upportions 17 slidable in the'openings 13 of the partition 12. l

Loose on the rods 16 and surrounding the able between the ends of theyoke 9 and the ends of the stops 10 and is normally held against thenuts 24 on the ends of the tie rods 16, said nuts extending into theyoke 9.

Slidable in the yoke 9 are buffer tie rods 25 provided with washers 26and coiled springs 27, said springs holding the wash ers 26 normallyagainst the yoke 9 and 'the nuts 24. As shown in Fig. 8, an additionalset of springs 28 may be used for the same purpose as the springs 27,particularly in a draft rigging for passenger cars.

Considering the operation of the draft rigging and a draft in thedirection of arrow A, Fig. 1, the draw bar 15 can shift theV cross head14 toward the ends of the stops T and 1n consequence of this movement,the.

follower 22 remains stationary against the stops 6, the abutment members19 are picked up or carried with the tie rods 16 placing the springs 2Ounder compression against the follower 22, and the abutment members 18remain stationary while the follower 23 places the springs 2() undercompression against the -abutment members 18. The follower 23 is limitedin its movement by the stops 10 and the springs 27 remain inactiveduring thisdraft movement. Y

Considering a buff action in the direction of the arrow B, Fig. 1, thefollower 23 and the abutment members 19 remain stationary, and thefollower 22 and the abutment members 18 are shifted, placing the springs20 under compression. The nuts 24 engaging the washers 26 and springs 27cause said springs to be placed under compression in the yoke 9; therods 25 sliding in said yoke during this movement. It is now apparentthat three ormore sets ofsprings may eooperate in resisting a buffaction. Irrespective of the number of sets of springs employed, I attachconsiderable importance to the novel arrangement of the stops,followers, abutment members and tie rods, and while in the drawingsthere are illustrated the preferred embodiments of my invention, it isto be understood that such changes as fall within the scope of theappended claim may be resorted to without departing from the spirit ofthe invention.

What I claim is In a draft rigging, a housing, a draw bar extendingtherein, a head connected to said draw bar, short and long stops carriedby the confronting walls of said housing at one end thereof and theshort stops adapted to be engaged by said head, a U shapedrear vstopcarried by the side walls of said housing at the opposite end thereof,sets of stops carried by the side walls of saidhousing intermediate saidU shaped rear stop and said long stops, a partition'betweentheintermediate sets of stops, rods carried bysaid head and extendingthrough said partition into said U Vshaped rear stop, a follower on saidrods normally engaging said long stops andadapted to be shifted by saidVhead into engagement with one set of stops, a follower on said rodsnormally engaging said U shaped rear stop and adapted to be 'shiftedinto engagement with the other set of stops, abutments on said rods insaid U shaped rear stop for shifting the last mentioned follower,piek-up portions on said rods in said partition, abutments on thepick-up portions of said rods normally engaging said partition andadapted to move with said rods in opposite directions, springs on saidrods in said, U shaped rear stop against the 'abutments therein, andsprings on said rods against the partition abutments and said followers.

In testimony whereof I affix my signature in the presence of twowitnesses.

AARON N. VVARFIELD.

, Witnesses: y

R. E. VALKER, J WV. G. WINNETH.

